白榆杂交与苗期选择

Hybridization and selection of elm

试验以春榆、欧洲白榆、大果榆作父本,以白榆作母本进行杂交,对杂交获得杂交胚的能力、得到种子的难易、杂种种子发芽率和苗期地径和苗高生长量进行比较。结果显示各个杂交组合杂交较易取得成功,就苗期数据来看,个别杂交组合F1代杂种优势明显。

In this paper,4 elm species of Ulmus japonica,U.macrocarpa,U.pumila,U.laciniana are chose as female parent,and U.laevis as male parent to select new elm by hybridization.The possibility of getting hybrid seed,the germination rate of hybrid seed,the increment of seeding height and base diameter are compared.